5 Drought-resistant Groundcovers

Groundcovers might not be as sexy or exciting to plant as some ornamentals, but the low-growing plants are useful and can really add to a xeric garden’s look and function.

Prairie zinnia
Prairie zinnia covers ground and rocks. Anything that grows in rocks gets by with little water!

Here are a few reasons and ways to use groundcovers:

Water savings: erosion control. On garden slopes, a low-growing groundcover slows the flow of water. Use one that’s relatively drought tolerant and the plant absorbs enough water from the flow to get by. An added bonus – slopes can be difficult to mow, and a low-growing groundcover needs less maintenance.

Water savings: mulch effect. Groundcovers cool the soil below and retain some moisture, which can work as a sort of living mulch under a tree or other plant that needs cooler roots.

Turf alternative: Groundcovers typically are less invasive and easier to control than grass, especially between flagstone or other steps.

groundcover between stones
I believe this is ajuga between flagstones in a private Atlanta garden. It creates a sort of woodland look.

Weed control. Once a groundcover blankets an area, weeds have a harder time growing in the same spot. It might not entirely eliminate them, but eventually weed seeds have a harder time getting into covered soil and receive less light.

Design element. Groundcovers can add color, year-round interest and an area of low growth in the foreground of a design or near paths. Check out this gorgeous example of creeping thyme as an alternative lawn in a xeric design.

  1. Creeping thyme (Thymus ‘Pink Chintz’). This is an excellent choice for filling in around flagstone steps or any area that takes foot traffic (see link above). In fact, several thyme varieties are considered steppable. Creeping thyme does fine with low water once it’s established, but if it receives more water, it grows more rapidly, which might help to fill in an area.

    Alan's Apricot ice plant
    Alan’s Apricot ice plant boasts larger, color-changing blooms. Courtesy of Plant Select and Alan Tower.
  2. Ice plant (Delosperma). The flowers of ice plants are delicate and bright, coming in yellow, bright pink or salmon and rust colors. Although some varieties of ice plant need a little more water than others, most can get by in xeric rock gardens. Ice plant is a rapid spreader and easy to maintain. If it grows outside the area you intend, just clip it off. Or pull up a stalk and its roots and move it to another spot in your garden.

    purple ice plant
    Purple iceplant in a bed on the north side of our home.
  3. Perky Sue (Tetraneuris scaposa). Although Perky Sue might not technically be a groundcover, it can spread enough to add floral color and evergreen foliage. I’ve seen this or a nearly identical plant called plenty of other names, including Hymenoxys scaposa, bitterweed, and narrow four-leaf nerve daisy. It’s also similar to the Angelita daisy (T. acaulis).

    Perky Sue
    Perky sue has silver-like foliage and yellow daisy flowers.
  4. Prairie zinnia (Zinnia grandiflora). Also called desert zinnia, this is a favorite rock garden groundcover of mine. It has tiny, thread-like leaves and bright yellow flowers. Most of all, it spreads from the previous year’s plant; you simply remove the spent foliage as the weather warms and you see new green beneath the old. It can spread up to 6 or 10 feet.

    zinnia grandiflora shadow
    Delicate, spreading and xeric. The prairie or desert zinnia.
  5. Plumbago (Ceratostigma plumbaginoides). The best part of plumbago is its fall color. The purple flowers typically bloom in early fall and then the leaves redden. Plumbago also does best in shade or part (afternoon) shade in warmer areas.
groundcovers rock gardens
Veronica is another low-spreading groundcover for rock gardens. A Perky Sue bloom is peeking out on the left — in March!

All of these groundcovers are perennial and hardy to zone 6 or cooler. Groundcovers can require some patience or money. For carpet-like coverage, you either have to plant many of them fairly close together, or ideally space new plants according to planting instructions and wait for them to fill in. Some also have minds of their own. To me, the haphazard growth is more natural looking in a rock or xeric garden. But if you’re going for a formal look, choose one that’s easier to control, such as thyme.

Plant Select’s Top High Plains and Intermountain Plants

Each year various societies present plant awards, but those of us who garden in the West and Southwest await the group of Plant Select top performers. Plant Select, which is a nonprofit joint effort of Colorado State University in Ft. Collins, the Denver Botanic Gardens and professional horticulturalists, lists five top performers at various elevations.

blonde ambition grama
Blonde Ambition ornamental grama grass tops the 2016 Plant Select list. Photo courtesy of Plant Select.

First, a word about why the work of Plant Select and other regional groups is so important. As I said, there are plenty of awards and lots of information in the gardening world. But, for the most part, plants emphasized by magazines and bloggers are great for East Coast and Southeastern region gardeners. It’s different in the high plains and intermountain areas of the country, where altitude, wind, and heat and cold extremes (in a single day and by season) affect plant health. And let’s not forget the water issue.

Plant Select evaluates plant performance in 53 locations throughout five Western states. Here are some of the 2016 Top Performers. See the entire list at Plant Select.

Grand Winner: Blonde Ambition Grama Grass

Blonde Ambition grama (Bouteloua gracilis ‘Blonde Ambition’ PP22,048) was introduced by New Mexico’s David Salman of High Country Gardens (American Meadows). Blue grama is a perfect low-water native grass grazed on by cattle on our Southwest ranches. Salman introduced the blonde ornamental variety in 2011, and this is the second year it has been Plant Select’s grand winner. Beginning in July, chartreuse blooms (seedheads) appear on upright stems, turning to the blonde color as they age. Watching those seedheads wave in winter winds provides xeric gardeners some year-round interest in their landscapes. Although Blonde Ambition can spread by seed, the seedlings are easily pulled up. The grass is hardy in zones 4 through 9 and deer resistant.

Blonde ambition seedheads
Blonde Ambition looks great in groups or as a single plant in the xeric garden. Photo courtesy of Plant Select.

Top Performer at 3,000 to 5,500 Feet Elevation

Blonde Ambition also tops the list of lower elevation garden performers in the region. Number 2 on the list is a tree I’ve never grown, but want to learn more about since it also topped the list for gardens at my altitude (6,300 feet). The Hot Wings Tatarian maple (Acer tataricum ‘Gar ann’PP15,023) has bright red samaras, or fruit made of paper tissue, that bloom all summer. It’s also known for its reddish-purple fall color. The Tartarian maple is a relatively small tree, maturing to nearly 18 feet high and wide, and gets by with full sun and moderate to dry water needs. The only drawback for me is that it is not deer resistant, but I could see this gorgeous tree in any suburban garden from 3,000 to 7,000 feet in elevation and in zones 4 through 10. We still might try it, but we’ll have to fence the tree until it reaches a mature height and keep lower limbs pruned.

top performer hot wings tartarian maple
The Hot Wings Tartarian maple has a gorgeous canopy, but I also love the trunk. Photo courtesy of Plant Select.

Top Performer at 5,501 to 7,000 Feet elevation

Although the Hot Wings maple topped the list of performers at this elevation, I would like to give a nod to No. 2 on the list – Turkish veronica (Veronica liwanensis). Veronica is an excellent low-water groundcover. Veronica is evergreen, so it covers portions of our rock garden all year long. In summer, the groundcover blooms. Turkish veronica has cobalt blue flowers above waxy leaves. It only reaches about 2 inches in height, but can spread to 18 inches wide. Although veronica is a xeric plant, its leaves look better with a little extra water in the heat of summer. Turkish veronica is hardy in zones 3 through 10 and deer resistant. The top 5 Plant Select performers at this elevation also include Blonde Ambition, Apache plume and a catmint called Little Trudy (Nepeta ‘Psfike’ PP18,904).

turkish veronica plant select
Gardeners can prune Turkish veronica around rocks and paths. Photo courtesy of Plant Select.

Top Performer in Gardens Higher than 7,000 Feet

Fernbush (Chamaebatiaria millefolium) topped the list for higher elevations. The Western native shrub is xeric once established and grows more upright with less water. It can look more formal with rounded pruning in early winter. Deadheading spent flowers also makes the plant look neater, and should be pleasant considering that the foliage has a honey-like scent. The sweet scent also deters deer. Fernbush can grow to nearly 5 feet high and wide; less water keeps it more compact. The plant thrives in full or partial sun in zones 4B through 8.

fernbush plant select
This fernbush provides year-round interest in a high-altitude garden. Photo courtesy of Plant Select.

These are only a few of the top performers in the Plant Select list. Check out their site for more on current and past top performers, new plant introductions for the region and where to buy plants for High Plains and Intermountain gardens.

Watering Cacti and Succulents

Succulents are low-care starter plants for anyone easing into gardening or short on space. Best of all, they’re typically the lowest water users of the plant world. It’s often said that cacti and succulents thrive on neglect. Although that might be true when it comes to maintenance such as trimming or fertilizing, cacti and succulents do need a little attention and consistent, light watering.

barrel cacti
Rocks, heat, hills that drain water. These conditions make cacti happy. This image was taken at the Huntington Library and Botanical Gardens in San Marino, Calif.

Water Sparingly

The common characteristic of succulents is that they have adapted to surviving with little water. Cacti are tough, and about the only thing that will kill them (other than being munched or trampled  by wildlife) is overwatering. In general, about once a week is perfect. Set a date every Saturday morning, for instance, to water and check on indoor succulents. The best way to water container succulents is by making two trips – water your succulents once with a slow, steady stream. Don’t give them so much water that it runs out the bottom of the container, but give them enough to soak in past the surface. Then come back and give them a second drink, which makes for a deeper and more even watering.

agave parryi in snow
These agave survive outdoors here in zone 6B. We don’t water them, but from time to time, nature does the job.

The best watering for outdoor succulents is through a steady drip. How much depends on conditions, just like with other plants. When heat is extreme, cacti and succulents need a little more water. When it rains, you can skip watering altogether. If you bring cacti indoors for winter, they need a little more water in a hot, dry and sunny room.

Transplanting and Repotting

Have you ever seen a photo of an avocado pit in a glass with roots sprouting from the pit? Like most plants, lots of water encourages roots to grow. The same goes when placing most new plants in the ground or a new container—extra, deep watering helps roots establish. But that’s not true of succulents. They need time to heal before you water. In fact, taking a cutting from a cactus to grow a new plant (propagating) means letting the cutting rest and dry before putting in soil!

cacti in sunny window
Tim propagated many of these succulents from cuttings.

If you want a mixed arrangement indoors or out, try to make sure your cactus or succulent receives only the water it needs. In the landscape, you can mound the dirt under the plant slightly so that water drains to nearby plants with higher water needs or have a dedicated drip for the succulent that emits less water. Avoid spray irrigation, especially on succulents. In container arrangements, keep your cactus in a small plastic container half-buried in the container’s soil. This helps the gardener pour more water to flowers around the cactus than directly on it, which helps keep the cactus soil from getting soggy.

deep pink cactus bloom
This as-yet unidentified cactus (most likely a Mammillaria) came from ranch land east of Roswell, N.M. It’s been happy in a container, spending summer on the patio and winter in a south-facing window.

Do a Little Research

All cacti are succulents, but not all succulents are in the cactus (Cactaceae) family. In general, succulents are known for their fleshy leaves that hold water. Their leaves usually are small as well – leaving less surface for transpiration, which is the plant equivalent of evaporation.

fenestraria baby toes flower
Baby toes (Fenestraria) are so-named for their swollen ends, a classic succulent survival feature. The flowers are pretty awesome too.

Just like with trees or flowers, every type of cactus and succulent is a little different. For example, Adenium, commonly called desert rose, is a gorgeous succulent member of the Apocyanaceae family, the same one that includes oleanders. Knowing that helps: First, the only true pest of adenium is an oleander caterpillar. Second, although technically a succulent, when the plant is in full leaf and flower season, it needs a lot of energy (sun and water) and can be treated more like a tropical plant. But adeniums drop their leaves in winter, even in indoor containers. When they go dormant, they need little to no water.

adenium in container
The Desert Rose (Adenium) drops its leaves in winter and needs little water while dormant (resting). When it starts getting flower buds, it needs a little more.

In fact, that’s true of nearly all cacti and succulents – they need more water (and some fertilizer) during their growing/flowering periods and just enough to get by when dormant. Most will flower and grow in spring, fall and cooler parts of summer. High summer heat can make them dormant as a survival tactic.

It’s easy to research cacti and succulents in regional garden books and online, using reputable and regional sources when possible.

Repotting

Although most cacti and succulents grow more slowly than typical garden or house plants, they can outgrow their pots. In addition, succulents grown in pots and watered from a tap can have problems when minerals from the water build up in the soil. That’s a second reason to repot. You can avoid the mineral build-up by using rainwater for cacti and succulents instead of tap. Be sure your plant is in a container that drains well. That means drilling holes in the bottom of any containers that lack them and filling them with planting medium only (no rock or other filtering materials at the bottom).

split rock
The split rock cactus (Pleiospilos nelii) is native to South Africa and does well in a container, as long a you cut back on water in the heat of summer and cold of winter.

Of course, soil, location or zone and other factors affect the health and water needs of cacti and succulent. But most adapt to soil and environmental conditions.

echeveria
The fleshy leaves of an echeveria. These are such pretty and easy-care succulents.

Gardeners can adapt to – and enjoy – caring for succulents. Check out our Pinterest page on cacti and succulents for more information and photos.

Five Starter Waterwise Plants

Need to ease into saving water in the lawn? Or just ease into gardening? As you think about next spring and ideas for improving both the look and sustainability of your lawn or garden, consider adding easy-care plants that need little to no watering. Here are five ideas:

Yarrow is an easy xeric plant
Bright yellow yarrow anchors this bed and is accented by light purple salvia and California poppies

Rosemary (Rosmarinus officinalis). The woody, herbal rosemary is near the top of my list of favorite xeric plants. The only problem you can have with rosemary is if it receives too much water (or snowpack in winter). Otherwise, try a creeping rosemary near a rock or low garden wall. The stems will grow over the surface and you can trim it in spring just to keep it clean and healthy. I’ve seen bushier varieties shaped into small hedges. And man, what a great-smelling hedge! Finally, be sure to plant a rosemary near your kitchen so you can head out and clip cuttings for cooking use anytime of year (at least in zones 8 through 10). We have rosemary plants that come back each year here in zone 6B. They’re near the house in a rock garden, which helps warm them up. Plant rosemary in full sun and only water occasionally after its first season in the garden. Rosemary plants also reward you with tiny lavender-colored flowers in summer. And although I love the taste of rosemary, deer leave them alone. Bonus!

booming rosemary
This rosemary bloomed in late summer. The foliage alone is attractive and aromatic.

Barberry (Berberis). Barberry comes in several varieties that do well in plenty of sun (or partial shade) and low water. Berberis x ‘Tara’ Emerald Carousel is a type that grows well in alkaline soils, the kind we have here in New Mexico. Depending on the variety, barberry grows a little wider than high. Some Japanese barberries can grow tall – up to 10 feet – so consider that when selecting a plant. Barberry leaves change color with the season, and I’ve seen lime, orange and deep red varieties; they’re all stunning. Several plants along a wall can form a hedge in front of a house or fence. We like the spiky red foliage for its color and texture in our garden and deer usually avoid the plants. Barberries might need a little more water in the first year or so than some plants listed here. After that, they can handle periods of near drought or drought. All you have to do is prune them once or twice a year to keep the shape or size you like. Be sure to wear gloves!

Barberry is a great foundation plant.
Close-up of the maroon-toned leaves and spikes on our barberry.
Sunset's orange rocket barberry
‘Orange rocket’ is a berberis from Sunset that takes heat and little water or care. Image courtesy of Sunset Western Garden Collection.

Yarrow (Achillea). Yarrow is considered an herb, but I grow it for its easy care and stunning colors, which include white, yellow and red varieties. Moonshine yarrow has bright yellow flower clusters that you can cut for arrangements. I also pressed a few this year. This truly is one of the easiest plants to grow. Each spring, you simply cut off the dead flower stalks and clean up the plant. By mid-summer, you’ll have color. I even tried trimming spent flowers off one of our yarrow plants this year to see if that would force a second bloom sooner. But the ones I didn’t trim had more blooms in the second wave of flowers than the one I trimmed. Lesson learned. After the initial spring trimming, just leave yarrow alone. The plant also spreads but not invasively, so consider that when placing it in a design. We dug up one that was too close to another plant and transplanted it near our farm to attract butterflies and bees. It needs a little more water when first planted or transplanted. After that, it can get by with no water in all but the most severe droughts and survives winters down to zone 3.

moonshine yarrow
Moonshine yarrow cluster of flowers.

Four-wing saltbush (Atriplex canescens). Native Americans used many parts of the native four-wing saltbush, including leaves and boiled roots, for food or medicine. It’s also useful to wildlife, grazed by deer and antelope. The name for the bush comes from the four paper-like wings that surround its seeds. There’s no real care needed for saltbush, especially in a natural garden, but you can trim it as desired. When saltbush flowers, it takes on an attractive two-tone effect. The native plant is easy to grow in any soil, and can pop up around roadways in New Mexico. Ours grows far from the garden along a fence. We don’t know if the former owners planted it or if it came up from seed. If you’re worried about it spreading, just learn to recognize the plant’s needle-like leaves and pull up any small plants in your garden or yard.

four-wing saltbush
Buster runs by our saltbush for helpful scale. I might have to trim this one soon, but love the wild look of the plant.

Jupiter’s beard (Centrathus ruber ‘Coccineus’). At first glance, Jupiter’s beard (also called red valerian) doesn’t look like much. The flowers rise above thin, pointed, pale-green leaves. So it’s a lot of foliage mixed in with small, coral-pink flowers. But these flowers pack a punch! They’ll bring bees and hummingbirds to your garden all summer. And they grow best in dry, hot conditions. Still, red valerian can survive frost down to zone 3, or about -30 degrees F. All you have to do is give Jupiter’s beard a sunny spot and water regularly the first spring and summer. Then you can pretty much leave it alone. We water once in spring, depending on rain. You can cut back old leaves and stalks in spring to give energy to new growth. The plant reaches about 2 feet high and wide.

Jupiter's beard is an easy-care xeric plant.
I don’t have a close-up of Jupiter’s beard, but enjoyed watching hummingbirds on the plant all summer. It’s the one on the upper left with small coral flowers.

Six Favorite Reseeding Flowers

Wildflowers that reseed are a perfect plant for busy and cash-strapped gardeners. Once you get them going in the garden, they’re sure to come back for years. The trick is to deadhead or cut the flowers for arrangements while in peak bloom and then let some spent flowers go to seed.

cosmos
Crazy cosmos! Ours have been popping up in the same area of our rock garden for four years. By leaving most of the spent flowers on the plant into fall, they easily reseed and feed finches.

With that in mind, choose a few plants or seeds for your favorite low-water annual and enjoy the colorful rewards for years. Here are six favorites of mine, most of them in the Aster (Asteraceae) family:

No. 1: Cosmos

Start with annuals or easily grow cosmos from seed. They come in a number of colors, including several versions of pinks and purples and white. The flower is a native of Mexico and can reach various heights depending on the mix and growing conditions. With too much water, they get a little tall and leggy. Sow cosmos after your last spring frost. Let several go to seed in fall to feed birds and provide next year’s color.

cosmos bloom
Close-up of a cosmos bloom.

No. 2: Blanketflower

Gaillardia, or blanketflower, is an annual or a perennial in zones 3 through 11. It reseeds in our garden and lawn. This drought-tolerant beauty adds yellows, orange and rust tones to the garden. The blooms attract bees and butterflies. Blanketflowers bloom best if the gardener deadheads spent flowers, cutting the stem just above the next set of leaves down the stalk. You can also cut the plant by about one-third at the end of summer instead of regularly deadheading. If you want the flowers to reseed in your garden, leave some dried heads on the plant well into fall.

gaillardia and cosmos in rock garden
Oh no, another cosmos photo. But this one shows the contrast with the earthy colored blanketflower.

No. 3: Mexican hat

Called Mexican hat or prairie coneflower, the Ratibida columnifera is yet another member of the Aster family that reseeds easily. Mexican hats can bloom all summer long with little to no water, adding earthy colored blooms to xeric gardens. They attract bees and are considered an herb with touted use to ease stomach pain or headaches. When planted from seed, they might not bloom until the second year, but will reseed. Because the seeds need cold to help them germinate, those dropping from a plant in fall in zones 4 through 9 stand an excellent chance of becoming new plants in spring.

Mexican hat
We have different colors of blooms on our Mexican hats, from mostly yellow to more of a deep rust. As you can see, they grow right out of the rocks.

No. 4: California/Mexican gold poppy

These wildflowers in the poppy family love sun and drought, but bloom best after summer rains. We call them California poppies (Eschcholzia californica). Mexican gold poppies are a subspecies of E. californica that thrive in desert settings. Both have feathery leaves and flowers about 2 inches in diameter that resemble a cross between an oriental poppy and a tubular or cupped flower. Deadheading the remaining seedhead helps them produce more flowers, but letting the seeds develop late in summer could lead to a new stunning poppy across the yard!

California or Mexican poppy
This deep orange poppy was in a wildflower seed mix.

No. 5: Coreopsis

Yet another member of the Aster family, coreopsis is a great self-sower. It might take over a garden in the right conditions, but our Lanceleaf Coreopsis, a classic yellow bloomer, spreads nicely in our dry climate. If you want more color, coreopsis won’t disappoint. Here, Sunset Magazine lists a dozen favorites for western gardens. Some varieties such as lanceleaf are perennials, depending on zone. They’re a fun, natural looking plant with flowers suitable for cutting.

lancelead coreopsis
Coreopsis blooms are similar to daisies. This plant has a few drying flower heads.

No. 6: Wild daisies

Like their relative the sunflower, native daisies in the Aster family can spread easily and pop up in unexpected locations. We have several that bloom in late fall and spread mostly by seed. The trick is recognizing these gems among a stand of weeds so you can let them grow to maturity and bloom, then reseed. Some wild daisies are invasive, but they’re easy to control in our dry climates. Bidens alba, also called common beggartick or Spanish needle, has tiny white flowers on lanky stems. They’re pretty and are touted to have herbal or medicinal uses, but as friends of mine pointed out, they have needle in their name for a reason. The seedheads not only help the flower spread, but get caught in nearly anything they touch, including dogs’ coats.

Spanish needles and asters
Mountain aster on the right and Spanish needle bloom and seed heads on the left.

You don’t necessarily need to gather seeds from these flowers unless you want to try the plant in a different area. We’ve had mixed success with that, maybe because a particular flower tends to reseed where conditions are best for the plant.

wild daisy New Mexico
I think this is a cowpen daisy, but am not certain. At any rate, the flower prefers our ditchbank and likely wouldn’t grow as well in a more controlled garden.

If you’d like to grow some of these reseeding flowers in your garden, check with your local master gardeners or a regional garden book or blog to see which types grow best in your region without becoming invasive. Of course, I go with the premise that I can always thin volunteer flowers if they get out of hand. That usually only means smack-dab in the middle of a walkway…

Sunflower from birds
Sunflowers are the top surprise reseeders, thanks to birds and wind.

Xeric Plants: Too Much Rain?

You know, I hate to sound ungrateful. We always need rain in New Mexico, if not to water all of the grass, trees and native plants, then to replace our valuable water tables. But in a climate of extremes, especially this summer, we’ve had several weeks of too much water and cool temperatures.

xeric garden after rain
I’m not bemoaning natural moisture. August rains brought greener native grasses and lot of blooming annuals. But it’s good to know what happens when too much rain hits a xeric garden.

Typically, New Mexico and many Southwestern states receive monsoon rain in the summer, and it accounts for at least half of the rain we receive in New Mexico and Arizona. Monsoons can start around mid-June and end late in September. Ours typically begin around the 4th of July. Monsoons consist of short but strong bursts of rain, usually in the afternoon. They’re fueled by the sun’s warming of Southwest land and nearby oceans at different rates. Water evaporation creates humidity over land, forming the clouds that then depend on temperature, atmospheric pressure, winds and mountain slopes to turn into storms.

ravens in dead tree
The clouds seem to bring birds out for active eating before they take cover from summer storms. These ravens love perching in a dead tree.

Typical is key here, however. This year, we had few to no monsoon storms. Instead, we had unseasonably hot and dry, followed by weeks of unseasonably cool and wet. The first rains did wonders at greening up our native grasses and plants. But then in August, the rain and clouds just kept coming. We just had a break, but now Hurricane Newton has struck Mexico and its remnant moisture is headed for southern Arizona and New Mexico.

Rio Ruidoso
Rain replenishes the river and ground water, but excessive moisture can topple old trees.

If arid areas need rain, why is so much rain bad? Flash flooding is a big problem in desert and mountain areas. But how does heavy rain affect xeric lawns and gardens?

First, plant roots need more than water to survive and thrive; they also need air. When you place a new plant in the ground, for example, you should press the soil around it lightly and avoid compacting it to the point that air can’t reach the roots. When excessive rain falls, the water replaces air in spaces around soil particles. As the water drains through the soil, air can again enter the spaces. But if the water keeps flowing from the surface, or especially pools, the spaces fail to open. Eventually, roots can be damaged and fail to even take up the water that surrounds them.

amended soil for vegetables and herbs
Adding organic matter eventually helps compacted soils drain better.

The second danger of too much water is disease. Any fungal organisms in the soil can more easily attack wet plant roots and cause root rot. Xeric plants are not used to so much water on their leaves and roots. Even leaves are affected by too much water falling and sitting on them, especially without sun and heat to dry them again. Plants are more susceptible to leaf diseases such as leaf spot or blight and have less chlorophyll, which affects appearance and photosynthesis. Eventually, poor leaf health can lead to the breakdown of most of the processes that keep a plant healthy and send energy to fruit and flowers.

mushrooms on tree stump
This old apple tree stump started a mini-mushroom farm after extended rain and clouds. What other fungi lurk in our soil now?

Many xeric plants also like sun and a little heat. Native plants have adapted to the Southwest monsoon patterns that usually rule their growing season: A gradual, sunny warm-up in the morning, followed by scattered building clouds. They get a nice drink in the heat of the afternoon, and then the sun comes back out and the air and ground warm up again. This pattern helps dry the plant and soil, and gives the plant plenty of heat and sun. Although nights can be cool in many areas of the high desert and intermountain regions, mornings warm up again after sunrise. Extended periods of cloudy, cool weather lead to too little sun for plants, along with too little heat than they need to thrive and flower.

cracked cherry tomatoes
Tomatoes need some heat and sun, along with consistent watering. These cherry tomatoes cracked before we could harvest them. It’s likely a combination of remaining on the vine too long and a surge of water from heavy storms.

Even edibles can have problems from too much water. They’re susceptible to root rot, depending on lots of other factors such as soil quality. Leafy vegetables and herbs flower early. Tomato fruit tastes better with moderate water. Too much water, especially inconsistent amounts, can cause fruit to crack.

Keeping Xeric Plants Alive During High Rain Periods

Make sure all plants, and especially those susceptible to root rot, are in soil that drains well. Raised beds, mounds or berms, and suitable containers can help drain soil around plants much better than compacted soil. If you’re not sure how well your soil drains, you can typically tell when it pools or soaks in hours after heavy rains. Or you can try the test in this handout from TreePeople that times water drainage.

okra plants
My husband is much better at spacing plants than I am. These okra didn’t get enough heat to produce much, but spacing helped the fruit get more sun and air.

Provide air circulation. We all have a tendency to place new plants and seedlings too close together. You might as well get as many cucumbers as possible in the limited space you have, right? But lack of air circulation in crowded plants hides bugs, causes the leaves to maintain moisture, and even can shade ground around roots. Wet conditions harbor new problems that native plants in particular can’t take.

California poppy
Flower from a poppy (Mexican gold or California Eschscholzia californica) thrives in drought, but can bloom more in heavy rain. As for the “garden art” it borders, that’s something personal between Tim and a steer.

Another problem with extended periods of rain is weed control. Although mostly native, the darn weeds seem to love excess moisture. And before you know it, they crowd and wrap around important garden plants or shading grasses. It’s hard to control them if the ground is too wet to mow or you can’t even get outside.

Build raised beds or transplant susceptible plants to higher ground. We’ve had some drainage problems near our patio and are working on a dry river bed to divert water away from the house foundation and down into a grassy area, where it can soak grass and eventually add to groundwater. One step we took was to divide a blue mist spirea (Caryopteris clandonensis) and move the portion near the patio onto a small burm. The xeric plant is so much happier now.

blue mist spirea berm
The dry bed is a work in progress, but just moving this blue mist spirea to higher ground saved the plant.

Whatever you do, don’t water! Turn off drip or sprinkler systems during and after periods of rain; it’s just the responsible thing to do. And don’t assume that yellowing leaves indicate the need to water. With too much water, the leaves look sort of floppy, but too little water usually causes dry, brittle foliage.

Finally, don’t stress. You can’t control weather, so simply keeping your plants as healthy as possible within time and weather constraints is all a gardener can do!

Favorite Xeric Plant: Lavender

It smells fantastic, looks gorgeous, attracts bees and butterflies and needs little water or care. And on top of that, it’s a useful herb. Truly, I can find no drawback to growing lavender in the arid Southwest. Still, I’ve talked to several people while selling at farmers’ markets who say they had trouble establishing or maintaining lavender. So, here are a few tips, because I wouldn’t mind seeing lavender on every corner of every town.

A customer's gorgeous farmers' market basket thanks to lavender!
A customer’s gorgeous farmers’ market basket thanks to lavender!

Where to plant lavender

It’s tempting to plant lavender everywhere in the landscape! But the plant does best in full sun and with plenty of air circulation. So, if you plant lavender on the north side of your house, especially up against the house, it might not do well. You can also plant lavender in containers, but might have to amend soil around the plant after a year or two. Be sure to place the container in full sun and give the container plant a little more water than it would need in the ground — but not too much!

Lavender hedges are a summer stunner. But if you want to plant a row of lavender, be sure to leave plenty of spacing between the plants, and between the lavender and other plants or structures in your garden. It won’t look as full the first year. But by year two, you’ll love how the flower stems nearly touch but the plants have plenty of room. And foremost, plant lavender where you can enjoy the scent and pollinators the plant attracts. And check nurseries soon for a new variety from Sunset called “Meerlo,” which has variegated leaves!

lavender sunflower
Lavender and sunflowers in the sunny xeric garden.

When to plant lavender

Whatever date you think is right for lavender, push it back a week. Seriously, the only real problem we had with some lavender plants occurred when a group of new plants were shipped to us too far ahead of our last frost date. Fearing the plants were becoming rootbound in their small nursery pots, I planted as soon as the frost passed. But the ground and air were still a little too cool, plus the dirt did not drain as well as other spots in our garden. So that meant the new plants would stay wet after rain or watering. The only problem that really affects lavender is root rot. So be sure the ground and temperature have warmed up enough before planting.

lavender in rock garden
Lavender looks and smells pretty close up or from a distance, especially in a breeze.

How to plant lavender

First, make sure the variety of lavender you’re ordered or chosen at a nursery is a perennial in your area. Years ago, I assumed that French lavender (which really is from Spain) would do better in our climate than English lavender. It’s so cool and damp there! But French lavender is not as cold hardy. Most varieties of English lavender, however, can survive U.S. winters. Just check the zone when you buy.

Here’s the trick to success with lavender: Plant it on a small mound. This is a departure from typical attempts to save water by welling around plants. A well can hold water in longer, but lavender wants to take a drink and then dry out. Also, by gathering up a mound of dirt, you give the young roots some nice loose soil.

new lavender plant
This new lavender plant is becoming well established. It’s on a small mound to keep water or snow from pooling around the roots. The next step is to add pebble mulch.

My second tip is to surround your lavender not with organic mulches, but with tiny white pebbles or decomposed granite. Doing so still allows water to penetrate, but gives the plants reflected sun and passive solar heat gain. If you use rocks and have as many weeds as we have, you’ll need to try and get the mulch layer at least three inches high. But leave a border several inches around the new plant on every side so the rocks don’t crowd the lavender base and constrict growth. Water more often than the plant tag says for a few weeks or more, until the plants look settled in their new home. But let new lavender plants dry out a little between watering or rain.

lavender with butterfly
Lavender is the perfect xeric plant. It also attracts bees and butterflies, and adds scent and color to the garden.

How to care for lavender

So, you have your lavender established. The hard part’s done! All you have to do how is harvest the gorgeous flower stems as the flowers begin to open in summer. In warmer climates, you often get a second bloom. We’ve found that our second bloom in zone 6B is pretty sporadic, even lousy. So it’s really a matter of choice – you can harvest early and enjoy the scent inside your home, or leave the stems on the plant to enjoy its color and share its fragrance with pollinators.

Just be sure to trim the stems off – right at the top of the leaves – at the end of summer or in early fall. Don’t worry if your plant turns a little gray in winter; it should begin to green up along with other perennial plants in spring. As new leaves begin to emerge in spring, trim your plant for shape and health. That means avoiding cutting down into the woody stems. I give mine a nice round shape. So simple.

lavender bunches farmers' market
Our lavender wands and sachets have been popular this year.

That second year, your plant should need little to no watering. I typically give lavender plants some water right after trimming in spring and then only water if we have severe drought.

The stems are easy to dry and place in a vase or use harvested buds to make sachets or potpourri. Lavender is great in homemade gifts and even as an edible.

For more about lavender, see our Pinterest board (Lovin Lavender).

Mix Up Your Garden Palette

Our low-water garden has lots of yellow. Maybe that’s true everywhere. And it’s a bright, happy color. But we like a little more variety, and it’s easy to add pops of color a little at a time, or with annual plants. Here are a few tips for finding plants of many colors.

yellow blooms
Yellow flowers like the ones on this chocolate flower plant (Berlandiera lyrata) are gorgeous, but I like to mix it up.
color mix in garden
When the butterfly bush blooms, we’ll have deep purple, red, and yellow. I’m adding a few low annuals to the front corner, which is closest to the patio.

Find flowers by color

Although you’re used to a favorite flower blooming in a particular color, there likely are hybrids with colors you hadn’t considered. For example, we think of sunflowers as bright yellow, but I love the cinnamon varieties. I’ve got some seeds in again, in the hopes that bugs and deer leave them alone.

larkspur pink lilac
Larkspur grow wild in our garden, and although most are a deep violet, we also have lilac, white and pink flowers.

One way to find flowers in complementary colors is by using apps and online databases. For example, the LadyBird Johnson Wildflowercenter’s database includes bloom color, along with native states and sun and moisture requirements in its combination search. For a simpler search, try a list like the one maintained by ProFlowers, which lists flowers by color next to illustrations and a brief description. Just beware that national lists of flowers often include varieties that do poorly in some zones or soils or need more water than those in a xeric garden. Be sure to read the descriptions or do a little research before making your final decision. You can also try apps that either have pictures shared by posters or plant identification. If you can find a local or regional app, even better.

White and red roses offer pretty contrast at the Hondo Iris Farm. If the plant isn't marked, just ask.
White and red roses offer pretty contrast at the Hondo Iris Farm. If the plant isn’t marked, just ask.

Wander around a nursery

If you feel a national list might isn’t giving you enough choices for your area, visit a locally owned nursery. Although they’ll carry some annual varieties that aren’t perfect for the community’s climate, they also carry plenty of knowledge and tend to feature plants that are native or adapted to local growing. If you do find a few annuals either at a local or chain nursery, limiting the number to a few pots or a corner of a bed uses less water, time and money than basing your garden color plan on annuals. Most nurseries separate perennials and annuals to help shoppers.

plants from local nursery
Bringing home the plants from our local nursery. I got a few annuals to add more red, white and black to our garden. And sometimes, the foliage adds lots of color, like with my new barberry.

Make notes as you pass homes and businesses

If you’re walking to a restaurant in town one night and spot a flower with a color you love or know would add variety to your garden, take a photo of the plant and a close-up of the flower. This will help you compare what you saw (and photos work much better than memory) with identification apps, databases and local gardening books. Including the entire plant in the photo helps you remember the type of foliage, height and spread of the flowering ornamental.

Flax and pine leaf penstemon color complement one another. A photo of the penstemon's leaves helps identify it.
Flax and pine leaf penstemon bloom colors complement one another. A photo of the penstemon’s leaves helps identify it.

Color really is a matter of personal choice, and with the recent National Pollinator Week in mind, I try to choose a few new plants for their ability to attract bees, butterflies or birds. For example, studies have shown that bees gather more nectar from purple or violet flowers than from any other color.

Bees love the purple flowers on the herb sage.
Bees love the purple flowers on the herb sage.

Keep it simple and choose what you like, but remember not all plants bloom at the same time, so your color variety might be seasonal or in stages. That’s great too though, so you and the pollinators can enjoy some new blooms every few weeks.

Bees really go nuts in cactus blooms.
It looks like the bee on the upper right dove head-first into this prickly pear bloom.

Favorite Xeric Plant: Gaura

Some call it a butterfly plant. That’s because gaura has delicate, swirly flowers at the ends of long stalks that resemble butterflies. In fact, one variety of gaura (G. lindheimeri) is called ‘Whirling Butterflies.’ It has white flowers; ‘Siskiyou Pink’ blooms have an earthy pink tone. And in 2014, Gaura ‘Sparkle White’ was an All-America Selections National Winner.

Eight stamens jut out from the delicate flower up long stems. No wonder they bring butterflies to mind.
Typically, eight stamens jut out from the delicate flower up long stems. No wonder gauras bring butterflies to mind.

We’re fortunate enough to have wild or native gauras (G. coccinea) in our garden. They appear on their own in late spring and bloom as temperatures warm. They’re a little more like a weed, partly because of the places they tend to appear, and partly because they have a higher foliage-to-flower ratio. Still, I’ll take them, and so will the bees!

Wild gauras have less attractive shape and foliage, but they pop up from seed!
Wild gauras have less attractive shape and foliage, but they pop up from seed!

Drought tolerant gaura

Native gauras appear along roadsides and other dry areas. Many of ours come up through rocks in the garden wall. You don’t have to read a plant tag to know that a plant growing robustly in rocks needs little to no water. We’ve had some trouble with gaura from nurseries, and I believe the reason is that the soil we chose was compacted and holding too much water. Still, if you plant a new gaura, it will need watering until healthy and established. A drip system can give the plant a slow drink.

This flower is from a volunteer gaura.
This flower is from a volunteer gaura.

Easy care

Once you’ve chosen a sandy or loamy soil for your plant, place it where it can get full sun. By the second year, you won’t have to water except maybe once in spring or in severe drought. I really love to place the white flowers where I can see them from a window or patio. It’s also a great plant for breezy areas, holding up to wind, which causes the flowers to “dance.” Most gauras reach about 2.5 to 3 feet tall; the native  varieties are a little shorter.

gaura against rocks
Gauras look terrific in rock gardens and natural designs.

Cut G. lindheimeri back in early spring about halfway down the foliage to keep it bushy, full and not too leggy. I let the native gauras go to seed so they pop up again the next year. You can try the same with nursery varieties; the plant might self-sow if seedheads remain in autumn. The only pests that bother gauras are flea beetles and gardeners who overwater them, especially if the plants are in heavy soil.

Versatile plant

Gauras are hardy in zones 5 through 8. In colder zones, the plant can be damaged if wet when temperatures dip to more than -15 Fahrenheit. Gaura is considered a perennial in those zones, but tends not to last as long as some hardy perennials.

gaura and gaillardia
These volunteer, or native, gauras popped up with volunteer gaillardias. I love the combination.

The gaura can fit into nearly any landscape design. Even before blooming, its slightly mottled leaves provide garden interest. I love to see it against a slightly taller plant with larger, bolder flowers (which also can support the gaura stems as the plant matures). Gaura also is perfect near steps, garden paths and walls. Although gaura fits perfectly in a natural xeric design, its delicate flowers can work in a cottage garden plan, provided it’s not overwatered or has really good drainage. Native gaura foliage and shape is not as stunning, but nonetheless a fun re-seeder in a naturalized xeric garden.

 

 

Purslane and Portulaca

I’ve grown to accept that some invasive plants (aka: weeds) are not so bad. I’m still on the fence with purslane (Portulaca oleracea), a prostrate spreading succulent that can take over entire flower beds.

portulaca flower
Ornamental portulaca from the same family as purslane. Note the ornamental’s thinner, needle-like leaves.

Weed or edible?

Purslane can grow in pavement, between rocks, and in moist conditions. It spreads from seed or from pieces of stems. And a purslane can have more than 50,000 seeds per plant. It re-roots after being hoed. That’s a weed, right? Still, many value purslane because it is edible. But in my mind, if the plant interferes with the objectives in managing a lawn or garden, it’s a weed. And since mats of purslane suck moisture and nutrients from soil and even shade soil from sun as they spread, they’re pretty much weeds in my book. That’s especially true in a vegetable garden, where I don’t want a weed competing for precious water.

purslane weed
Purslane taking over a rock garden. It’s best to pull it up before it gets this big, whether you eat it or throw it out.

Purslane was grown in India originally and provided nutrition and reported health benefits. Those who eat purslane have described its taste as lemony or similar to spinach. And the plant tastes best if “harvested” while its fleshy leaves still are young. So one way to eradicate common purslane where you don’t like it is to follow the philosophy “If you can’t beat ‘em, eat ‘em.”

You can spot common purslane as a small seedling with reddish-tinged leaves that form flat against the ground and spread out like spokes in a wheel. Pull it up before it sets seed to avoid having an entire bed full of the weed the next year. Not sure a weed is purslane? Check out these photos of seedlings and other stages of purslane from Missouri State University.

Ornamental value

Even common purslane can be pretty. The fleshy leaves contrast nicely with tiny, usually orange, flowers. And I bought one years ago before I knew better. I paid for that, because the plant came back with a vengeance, choking out other plants in a tiny rock garden. So if you choose to actually plant purslane as an edible, just beware that you’re introducing the seeds to your landscape.

heat loving drought tolerant portulaca
Portulaca is a great container plant. Use one color or mix many. The plant spreads and cascades slightly over the edge.

A better alternative is an ornamental portulaca such as P. grandiflora. You can tell an ornamental portulaca from a purslane by its leaves. Ornamental portulaca, often called moss rose, has more needle-like leaves than purslane foliage. The flowers also are showier, often looking either like a cactus bloom or a tiny carnation or rose. The best part? They love sun and heat, are highly drought tolerant, and will spread in warm climates to make an interesting groundcover. They’re also a perfect container plant, especially if you buy a mix of colors, which warm-climate nurseries usually carry. Both purslane and portulaca bloom in the morning after the sun has been up a few hours, and close later in the day.

Portulaca just planted in the ground. I hope they will cascade over these rocks and pavers and re-seed next year.
Portulaca just planted in the ground. I hope they will cascade over these rocks and pavers and re-seed next year.

Caring for portulacas

Portulaca is an annual, but can re-seed. Although not nearly as invasive as its purslane relative, an ornamental portulaca often pops up somewhere in the landscape. But to me, it’s a happy surprise. The easy-care, drought tolerant annual is welcome in our garden any time temperatures begin to warm up in early summer.

portulaca in hanging baskets
Portulaca actually do better with sun and heat, but who would have thought it would be 40 degrees F in mid-May? I can’t wait for these containers at the back of our garden to fill in.

Portulaca will keep blooming and spreading into fall, provided you do one thing: pinch off spent blooms. If you let most of the faded blooms remain on the stem, the plant can become leggy, plus it won’t bloom as often. The equivalent of deadheading this annual is so simple; just pinch the blooms off into your hand after they have closed up and begun to look withered. If the flower resists, wait a day. You’ll soon recognize the difference between a bud and a spent bloom.

portulaca and cactus
This portulaca re-seeded in some soil we repurposed for one of Tim’s cacti. It just goes to show how little water they need! You can see the bloom stages really well in this photo. A tiny dried-up flower peeks from behind the bloom; it’s ready to pinch off! Two new buds are a little lower on either side of the stem. And a faded bloom, nearly ready to pinch, lies at the lower right.

And if you want to pinch your portulaca while eating a salad with purslane leaves, that’s up to you. Just be armed with new recipes to cook up all of your purslane in years that follow.